a force is a push or pull. hope i helped!
Help quick please thank u
Answer:
I. 56
II. c is the speed of light in vacuum.
III. 385.180×10¯²⁷ Kg.
Explanation:
I. Determination of the value of p.
²³⁸₉₂U + ¹₀n —> ¹³⁹ₚBa + ⁹⁷₃₆Kr + 3 ¹₀n
92 + 0 = p + 36 + 3(0)
92 = p + 36
Collect like terms
92 – 36 = p
56 = p
Therefore, the value of p is 56
II. Determination of the meaning of c
ΔE = Δmc²
In the Einstein's equation above,
E => is the energy
m => is the mass
c => is the speed of light in vacuum.
III. Determination of the total mass of the element formed after the reaction.
From the reaction above, the elements formed after the reaction are:
Barium–139 and Krypton–97. Thus, we can obtain the total mass of the elements formed as follow:
Mass of Ba–139 = 232.560×10¯²⁷ Kg
Mass of Kr–97 = 152.620×10¯²⁷ Kg
Total mass =?
Total mass = mass of Ba–139 + mass of Kr–97
Total mass = 232.560×10¯²⁷ + 152.620×10¯²⁷
Total mass = 385.180×10¯²⁷ Kg
7. A wave was generated by Oscillation and paused at two different times.
Describe differences and similarities in the characteristics of the wave at different times
Answer:
Differences
The position of the particles in the wave are at different positions at the different times The velocity of each particle will posses different magnitudes and directionacceleration of particles will be different as wellsimilarities
wave length and wave speed will remain the same
Explanation:
A wave generated by Oscillation and paused at two different times will maintain certain characteristics at all times while some characteristics will differ along the wave as it it paused
The differences in the characteristics of the wave at different time ( i.e. at paused and unpaused times )
The position of the particles in the wave are at different positions at the different times The velocity of each particle will posses different magnitudes and directionacceleration of particles will be different as wellsimilarities :
wave length and wave speed will remain the same
A 50kg block is at rest on the ground.
(a) Draw a diagram of the block and draw in the forces acting on the block (label these forces)
(b) Determine the magnitude and direction of weight of the block and the normal force acting on the block.
Answer:
(b) 490 N downwards
Explanation:
(b) Formula : w= mg
m is the mass of the object
g is a gravitational constant (9.8)
w= mg
= 50×9.8
= 490 N downwards
What is the average velocity of the particle from rest to 9 seconds?
1 meter/second
B.
2 meters/second
C.
3 meters/second
D.
4 meters/second
30 unit If the value of an angle with the x-axis of a vector is 70 °, the value of the angle with the y axis is 60, what is the value of the angle with the z-axis?
Answer: [tex]37.28^{\circ}[/tex]
Explanation:
Given
Angle made with the x-axis is [tex]\alpha=70^{\circ}[/tex]
Angle made with the y-axis is [tex]\beta=60^{\circ}[/tex]
Suppose angle made with z-axis is [tex]\gamma[/tex]
[tex]\therefore \cos^2\alpha+\cos^2\beta+\cos^2\gamma =1[/tex]
Inserting values
[tex]\Rightarrow \cos^2(70^{\circ})+\cos^2(60^{\circ})+\cos^2\gamma=1\\\Rightarrow 0.1169+0.25+\cos^2\gamma=1\\\Rightarrow \cos^2\gamma=0.6331\\\Rightarrow \cos \gamma=0.7956\\\Rightarrow \gamma=37.28^{\circ}[/tex]
Whats the answer to 10a² - 6ab + 10 -2a² - 4ab +15b?
What 2 rules do scientists use to determine if something is a planet.
* Please use your own words to answer the question* THANK YOU VERY MUCH
Answer: one of the things that determinates something is a planet and not a star is that planets are constanlty moving around the sun while stars are "still"
Explanation:
Answer:
1. It must orbit a star (in our cosmic neighborhood, the Sun).
2. It must be big enough that its gravity cleared away any other objects of a similar size near its orbit around the Sun.
Explanation:
I hope this helps!
Can someone please help me with science
factors affect the rate of evaporation accept
a) humidity
b) nature of liquid
c) pressure
d) temperature
e) turbidity
Answer: e) turbidity
Explanation:
Evaporation is defined as the process by which a liquid without being heated is converted into vapor.
The factors that affect the rate of evaporation of a liquid are:
a) humidity-When the humidity of an environment is high, it will take more time for water to escape to the atmosphere and less time, if the reverse is the case because Humidity is the amount of water vapor in the atmosphere. For example, on a rainy day, clothes tend to dry slower than a sunny day.
b) nature of liquid- different liquids have different rate of evaporation, For example, alcohol will evaporate faster than water
c) pressure - The higher the pressure on the surface of a body of water, the slower the evaporation rate and vice versa.
d) temperature- The temperature of a surrounding affect how fast a liquid ,(water) can evaporate. When the temperature of the liquid is increased, it raises the kinetic energy of the individual molecules that make up the liquid thereby reducing the inter molecular forces of attraction holding the liquid together and causing fast escape into the atmosphere as a vapor or gas
e) turbidity shows the extent water loses its transparency due to the presence of suspended particles lie clay, silt, organic matter etc and so is not a factor that affect rate of evapouration
which list is in order from smallest to biggest
Answer:
b
Explanation:
the solar system is smaller then nebula nebula is smaller then a galaxie and a galaxie is smaller then a universe
explain why at the atomic level, conductors move charge easily and insulators do not
A projectile thrown up ward moves in its parabolic path at what point..
Answer:
please give me brainlist and follow
Explanation:
As the projectile moves upward, its vertical component of velocity decreases due to gravity. While the horizontal component remains the same as there is no acceleration in the horizontal direction. At maximum height vertical component of velocity is zero.
Ignoring air resistance, an object thrown in any direction moves in a parabolic path from the time it leaves the thrower's hand until the time it hits the ground or a physical obstruction.
A 10 ohm, 20 ohm, and 100 ohm resistors are connected in parallel. Calculate the total resistance.
Answer:
the answer is 6.25
Explanation:
Answer:
16/100 = 4/25
Explanation:
The given are 10 ohms 20 ohms and 100 ohms.
The formula for getting the parallel circuit is 1/r1 + 1/r2 + 1/r3 (the denominators are the given)
Then we calculate, Rp=1/10+1/20+1/100=10/100+5/100+1/100=16/100
A train is traveling at a speed of 80km/h when the conductor applies the brakes. The train slows with a constant acceleration of magnitude of 0.5 m/s^2. We want to find the distance the train travels from the time the conductor applies the brakes until the train comes to a complete stop. Which kinematic formula would be most useful to solve for the target unknown?
Answer:
d = 493.72 m
Explanation:
Given that,
Initial velocity of the train, u = 80 km/h = 22.22 m/s
Acceleration of the train, a = -0.5 m/s² (negative as it slows down)
Finally brakes are applied, v = 0
We need to find the distance the train travels. Let the distance be d. Using third equation of kinematics to find it.
[tex]v^2-u^2=2ad\\\\d=\dfrac{v^2-u^2}{2a}\\\\d=\dfrac{0^2-(22.22)^2}{2\times (-0.5)}\\\\d=493.72\ m[/tex]
So, the required distance is equal to 493.72 m.
A 500N car is pulled up to 20m plank to a flat form 5m above the ground by an effort of 150N parallel to the plank. Calculate Velocity Ratio?
Answer:
4
Explanation:
Velocity ratio is the ratio of distance moved by effort to the ratio of distance moved by load
Velocity ratio = Distance moved by effort / Distance moved by load
Distance moved by effort = 20m
Distance moved by load = 5m
20m / 5m = 4
when people walked on the moon, they found that they could jump higher than theu could back on earth. why is this true?
Answer:
There is less gravity on the moon
hope this helps
have a good day :)
Explanation:
How much force is needed to keep the bowling ball moving towards the pins once it has
left the man's hand?
Please help me!
Answer:
Explanation:
The amount of force needed needs to be greater than all the forces acting in the opposite direction that the bowling ball was thrown. This includes air resistance, floor friction, gravity, and any other force involved. As long as the force acting on the bowling ball that is causing it to go in the direction of the pins is slightly greater than the opposite acting forces then it will continue in that direction. Since no values are provided we cannot calculate the actual precise value of force needed.
speed of light in air is 3 x 10 m/s, determine the speed of light in the glass fibre.
Mark the correct statement: a) Charges flow through a circuit b) voltage is applied across the circuit c) voltage is the ratio of energy per coulomb of charge d) All of the above e) none of the above
Answer:
The correct option is;
d) All of the above
Explanation:
a) In an electric circuit through which electric current flows, it is due to the electric charges which can be the negatively charged electrons or the positively charged protons
b) Voltage is the potential difference that results in current flowing through the circuit, therefore, the voltage is applied across the circuit through which current flows
c) The voltage which is the electric potential difference is the change in potential energy in joules of a given system due to the movement of a test charge (in Coulombs) between points in the electric field, ΔE, divided by the value of the test charge, 'q'
V = ΔE/q
Therefore, all of the above are correct.
if you push a small act with 7,000 N force and push a heavy truck with the same force, which one will have a greater acceleration?
Answer:
the small one will have greater acceleration
Explanation:
force and mass are inversely proportional. force and acceleration are directly proportional. which means greater mass have smaller acceleration and smaller mass has greater acceleration. this is due to newtons second law of motion.
The small object will have greater acceleration as compared to a heavy truck if we push with the same amount of force, i.e., 7000 N.
What is acceleration?Acceleration is proportional to change in velocity.
When there will be a change in velocity with time, that is called acceleration.
[tex]\vec{a}[/tex]=[tex]\vec{dv}/dt[/tex] where,
[tex]\vec{a}[/tex] is the acceleration,
[tex]\vec{dv}[/tex] is the change in velocity and,
dt is change in time.
It is a vector quantity.
SI unit of acceleration is [tex]m/s^{2}[/tex].
There are several types of acceleration :
Uniform acceleration Non-Uniform accelerationInstantaneous acceleration.As we know that acceleration depends on the change in velocity and velocity of a body depends on the mass of the body. So if the body has less mass it must have a higher velocity and if it has a higher velocity than it has greater acceleration.
Hence, the small object/body has greater acceleration as compared to a heavy truck.
For more information about Acceleration :
https://brainly.com/question/12550364
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A bullet with a mass of 0.020 kg collides with a 2.5 kg wooden block at
rest. After the collision, the bullet and the block travel at a speed of 1.2
m/s. What is the velocity of the bullet BEFORE the collision? *
Answer:
151.2 m/s
Explanation:
m1 = 0.020 kg
m2 = 2.5 kg
vf = 1.2 m/s
m1v1 +m2v2 = (m1 +m2)vf
0.020v1 + 0 = (0.020 +2.5)(1.2)
---> 151.2 m/s
Which of the following describe an electric motor?
Check all that apply.
A. Uses the interaction between a spinning coil of wire and a magnet
B. Can be powered by a hand crank
c. Changes mechanical energy to electrical enggy
D. Is found in many appliances with moving parts, like a vacuum
cleaner or a blender
Answer:
C. Changes mechanical energy to electrical
Answer:
A,C and D
Explanation:
A gold bar has a density of 19.3 g/mL. If the gold bar has a mass of 6.3 grams, what is the volume?
Answer:
The correct answer is "0.32 mL".
Explanation:
The given values are:
Density of gold bar,
d = 19.3 g/mL
Mass of gold bar,
m = 6.3 grams
Now,
The volume will be:
⇒ [tex]Density = \frac{Mass}{Volume}[/tex]
or,
⇒ [tex]Volume=\frac{Mass}{Density}[/tex]
On substituting the values, we get
⇒ [tex]=\frac{6.3 \ g}{19.3 \ g/mL}[/tex]
⇒ [tex]=0.32 \ mL[/tex]
Write a hypothesis about the effect of increasing resistance on the current in the circuit. Use the "if . . . then . . . because . . ." format and be sure to answer the lesson question: "How do changes in voltage or resistance affect current in an electric circuit?"
Sample Response: If resistance in a circuit is increased under constant voltage, then current must decrease because Ohm's law states that resistance and current are inversely proportional.
edge 2021
Answer:
If resistance in a circuit is increased under constant voltage, then current must decrease because Ohm's law states that resistance and current are inversely proportional.
Explanation:
edge 2021
The Pine Mountain Ski Jump in Michigan is an artificial ski jump and is one of the highest in the world. It is approximately 200 meters high. Calculate the mechanical energy of a 52-kg jumper if halfway down the ski jump, the jumper has both potential and kinetic energy. At this point, the jumper's speed is 28 m/s.
Answer:
71344 J
Explanation:
From the law of conservation of energy,
Mechanical Energy = Kinetic Energy + Potential Energy
M.E = (mv²/2)+ mgh.................... Equation 1
Where M.E = Mechanical Energy, m = mass, v = Velocity, h = height, g = acceleration due to gravity.
Given: m = 52 kg, v = 28 m/s, h = 100 m (half way down the ski jump)
Constant: g = 9.8 m/s²
Substitute these values into equation 1
M.E = (52×28²/2) + (52×100×9.8)
M.E = 20384+50960
M.E = 71344 J
A car with a mass of 880 kg is moving on the road with constant velocity. The force exerted by engine is 1600N. What is the frictional force between the road an the car?
Answer:
1600 N
Explanation:
F-F' = ma.................. Equation 1
Where F = Force exerted by the engine, F' = Frictional Force, m = mass of the car, a = acceleration of the car.
make F' the subject of the equation
F' = F-ma............... Equation 2
Given: F = 1600 N, m = 880 kg, a = 0 m/s (moving with a constant velocity).
Substitite these values into equation 2
F' = 1600+880(0)
F' = 1600 N.
You are allowed to change the number of molecules of each substance by adding coefficients in front of the formulas.
True
False
Answer:
This is false.
Explanation:
No; you cannot change the formulas of individual substances because the chemical formula for a given substance is characteristic of that substance. What you can do, however, is to change the number of molecules that react or are produced.
Which of the following statements best describes a series circuit?
Question 24 options:
Every time another light is added, the lights all remain the same brightness.
The voltage across each resistor is the same as the battery voltage.
If one device in the circuit stops working, the other devices will remain on.
When one light in the circuit burns out, the rest of the lights will go out.
Answer:
When one light in the circuit burns out, the rest of the lights will go out.
Explanation:
When one light goes out, and the current is broken. Causing all remaining lights to go out as well.
1. A wave on a rope has a wavelength of 2.0m And a frequency of 2.0 Hz. What is the speed of the wave?
Plzzzzzzz help!!!
Answer:
4
Explanation:
2*2
www.omnicalculator.com/physics/wavelength
What is the average?
Answer:
Explanation:you knoe i know
